<%
// This template allows to build reference tables for HTML
//
// Param:
// $0 : An optional tag to filter the list of HTML elements or a configuration object
//      The configuration object get three optional parameters:
//      * include : An array of tags, the HTML Element page must have one of them to be listed
//      * exclude : An array of tags, the HTML Element page must NOT have any of them to be listed
//      * elements: An array of elements name to add to the list of HTML elements (useful for custom list or not documented elements)


// LOCALISATION
// ------------

let l10n = {
    element : mdn.localString({
        "de"   : "Element",
        "en-US": "Element",
        "fr"   : "Élément",
        "zh-CN": "元素",
        "ru"   : "Элемент"
    }),

    description : mdn.localString({
        "de"   : "Beschreibung",
        "en-US": "Description",
        "zh-CN": "描述",
        "ru"   : "Описание"
    }),

    deprecated : mdn.localString({
        "de"   : "Dieses Element ist veraltet.",
        "en-US": "This element is deprecated.",
        "fr"   : "Cet élément est obsolète.",
        "zh-CN": "该元素已被废弃",
        "ru"   : "Этот элемент устарел."
    }),

    experimental : mdn.localString({
        "de"   : "Dieses Element wird als experimentell erachtet.",
        "en-US": "This element is considered experimental.",
        "fr"   : "Cet élément est considéré comme experimental.",
        "zh-CN": "该元素仍处于试验阶段",
        "ru"   : "Этот элемент считается экспериментальным."
    }),

    html5 : mdn.localString({
        "de"   : "Dieses Element wurde mit HTML5 eingeführt.",
        "en-US": "This element has been introduced with HTML5.",
        "fr"   : "Cet élément a été ajouté avec HTML5.",
        "zh-CN": "该元素于 HTML5 规范中引入",
        "ru"   : "Этот элемент не был представлен в HTML5."
    }),

    components : mdn.localString({
        "de"   : "Dieses Element wurde mit den Web Components Spezifikationen eingeführt.",
        "en-US": "This element has been introduced with the Web Components specifications.",
        "fr"   : "Cet élément a été introduit par les spécifications sur les Web Components.",
        "zh-CN": "该元素于 Web 组建规范中引入",
        "ru"   : "Этот элемент представлен в спецификации Веб компонентов."
    })
};


// UTILS
// -----

// Simple function to turn a string into lower case. This especialy made to work
// as a walking function for Array.prototypt.map
function lowerMe(S) {
    return S.toLowerCase();
}

// Function to check is two Arrays has at least one value in common.
function hasCommonTag(A, B) {
    if (!Array.isArray(A) || !Array.isArray(A)) return false;

    // To fasten check, we make sure b is always the smaller array.
    var a = A.length >= B.length ? A : B;
    var b = A.length >= B.length ? B : A;

    for (var i in b) {
        if (a.indexOf(b[i]) > -1) return true;
    }

    return false;
}


// CODE VARIABLES
// --------------

let TagFilters = {
       include : typeof $0 === 'string' ? [lowerMe($0)]
                : $0 && $0.include && Array.isArray($0.include) ? $0.include.map(lowerMe)
                : [],
        exclude : $0 && $0.exclude && Array.isArray($0.exclude) ? $0.exclude.map(lowerMe)
                : []
};
let ForcedElements = $0 && $0.elements && Array.isArray($0.elements) ? $0.elements.map(lowerMe) : [];
let HTMLRefBaseURL = "/docs/Web/HTML/Element";
let HTMLLocalBaseURL = "/" + env.locale + HTMLRefBaseURL + "/";
let HTMLDocPages   = await page.subpagesExpand("/en-US" + HTMLRefBaseURL, 1);
let HTMLTags       = [];


// BUSINESS LOGIC
// --------------

// Get the relevant pages for HTML Elements based on the template input; include only
// the part of the title that's actually the element name
for(let page of HTMLDocPages) {
    let p;
    let t = lowerMe(page.slug.split("/").pop(-1));
    let tags = page.tags.map(lowerMe);

    if (ForcedElements.indexOf(t) > -1
    || ((TagFilters.include.length === 0 ||  hasCommonTag(tags, TagFilters.include))
    &&  (TagFilters.exclude.length === 0 || !hasCommonTag(tags, TagFilters.exclude)))){
        p = await wiki.getPage(HTMLLocalBaseURL + t);

        HTMLTags.push({
            tagName      : t,
            // We need to special case the "Heading elements" article
            // which stand for all hn elements.
            tagLink      : (t !== 'heading_elements'
                               ? await template("HTMLelement", [t])
                               : (await Promise.all([
                                   template("HTMLelement", ['h1']),
                                   template("HTMLelement", ['h2']),
                                   template("HTMLelement", ['h3']),
                                   template("HTMLelement", ['h4']),
                                   template("HTMLelement", ['h5']),
                                   template("HTMLelement", ['h6'])
                               ])).join(', ')),
            summary      : (p && p.summary) || "",
            deprecated   : hasCommonTag(tags, ['deprecated', 'obsolete']),
            experimental : hasCommonTag(tags, ['experimental']),
            html5        : hasCommonTag(tags, ['html5']),
            component    : hasCommonTag(tags, ['html components'])
        });
    }
}

// Handle elements inside the ForcedElements list which currently do not have
// an english documentation page yet.
let ElementList = HTMLTags.map(function (ele) {
    return ele.tagName;
});

let missingElement = [];
ForcedElements.forEach(function (ele) {
    if(ElementList.indexOf(ele) === -1) {
        missingElement.push(ele);
    }
});

if (missingElement.length > 0) {
   for(let t of missingElement) {
        HTMLTags.push({
            tagName      : t,
            tagLink      : await template("HTMLelement", [t]),
            summary      : "",
            deprecated   : false,
            experimental : false,
            html5        : false,
            component    : false
        });
    }
}

// We make sure elements are sorted in alphabetical order.
HTMLTags.sort(function (a, b) {
    return a.tagName.localeCompare(b.tagName);
});
%>
<table class="standard-table">
 <thead>
  <tr>
<%

%>
   <th scope="col"><%- l10n.element %></th>
   <th scope="col"><%- l10n.description %></th>
  </tr>
 </thead>
 <tbody>
 <%
 for (let i = 0, l = HTMLTags.length; i < l; i++) {
 %>
  <tr>
   <td style="vertical-align: top;"><%- HTMLTags[i].tagLink %></td>
   <td><%- HTMLTags[i].summary %></td>
  </tr>
<%
}
%>
 </tbody>
</table>
